var counter =function(arr){
    return "there are "+arr.length+"elements in the array";
}

var adder =function (a,b){
    return `the sum of the 2 number is ${a+b}`;
}

var pi=3.14;

//a
module.exports.counter=counter;
module.exports.adder=adder;
module.exports.pi=pi;

//b
module.exports={
    counter:counter,
    adder:adder,
    pi:pi
}